Resource exhaustion in Scriban
CVE-2026-74785
Scriban before 7.0.0 contains three distinct denial-of-service vulnerabilities in expression evaluation that bypass existing safety controls through unbounded string multiplication, uncontrolled BigInteger shift operations, and LoopLimit bypass via range enumeration in builtin functions. Attackers who can supply templates can cause out-of-memory exceptions or CPU exhaustion, typically terminating the entire host process.
Vulnerability class: DoS (Denial of Service)
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Scriban — versions 0, 7.0.0
Weakness classification (CWE)
References
- disclosure@vulncheck.com (vendor-advisory)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2026-74785?
- CVE-2026-74785 is a medium-severity vulnerability in Scriban, classified under Uncontrolled Resource Consumption. CVSS score: 6.5/10. Published 2026-08-16.
- How severe is CVE-2026-74785?
- Medium severity. CVSS v3 base score is 6.5 out of 10.